/docs/cryptography/ Recent content in Cryptography on tplat Hugo en /docs/cryptography/foundational/ Mon, 01 Jan 0001 00:00:00 +0000 /docs/cryptography/foundational/ <h1 id="foundational">Foundational<a class="anchor" href="#foundational"></a></h1> <p><strong>Cryptography</strong> is the practice and study of techniques for securing communication in the presence of adversaries. The primary goal is to <strong>conceal a message</strong> so that only intended recipients can understand it.</p> <h2 id="on-security">On Security<a class="anchor" href="#on-security"></a></h2> <hr> <p>The <strong>principles of information security</strong> provide a framework for protecting data. <strong>Confidentiality</strong> ensures that information is only accessible to authorized users, for example, encrypting emails so only the intended recipient can read them. <strong>Integrity</strong> guarantees that data is accurate and unaltered, such as using a checksum to verify a downloaded file has not been tampered with. <strong>Availability</strong> ensures that information and systems are accessible when needed, like maintaining redundant servers so a website remains online during outages. <strong>Authentication</strong> confirms the identity of users or systems, for instance, requiring a username and password before accessing an account. <strong>Non-repudiation</strong> prevents parties from denying their actions, such as using digital signatures to prove the sender authored a document.</p>